https://www.nature.com/articles/292154a0?error=cookies_not_supported&code=f753b3de-6f11-40af-ba88-2c705a0b3e24
Establishment in culture of pluripotential cells from mouse embryos | Nature
Pluripotential cells are present in a mouse embryo until at least an early post-implantation stage, as shown by their ability to take part hi the formation of...
in cultureestablishmentcellsmouseembryos